CN102160015B - Methods and systems for state-driven power savings for wimax - Google Patents
Methods and systems for state-driven power savings for wimax Download PDFInfo
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- CN102160015B CN102160015B CN200980136462.3A CN200980136462A CN102160015B CN 102160015 B CN102160015 B CN 102160015B CN 200980136462 A CN200980136462 A CN 200980136462A CN 102160015 B CN102160015 B CN 102160015B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0287—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment
- H04W52/029—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment reducing the clock frequency of the controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/324—Power saving characterised by the action undertaken by lowering clock frequency
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/3296—Power saving characterised by the action undertaken by lowering the supply or operating voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Methods and apparatus for conserving battery power in a mobile device for wireless communication by dynamically adjusting the clock frequency and/or the voltage of the device's processor according to the Media Access Control (MAC) layer state are provided. By using a higher clock frequency and/or a higher voltage for a normal operation state with large amounts of data traffic and lower clock frequencies and/or lower voltages for other MAC layer states (e.g., acquisition, network entry, and sleep/idle states), battery power may be conserved, thereby extending the time in which the device may operate between battery charging cycles.
Description
Technical field
Put it briefly, specific embodiment disclosed herein relates to radio communication, specifically, relates to and in mobile device, saves the energy content of battery.
Background technology
OFDM based on IEEE 802.16 (WiMAX) and OFDMA wireless communication system come to communicate with wireless device (that is, movement station) with base station network, and the orthogonality of the frequency of this wireless device based on a plurality of subcarriers is carried out the service in Accreditation System.This wireless system can be implemented to reach a large amount of technical advantages for broadband wireless communications, for example, and opposing multipath fading and interference.Send and received RF (RF) signal each base station (BS), the latter to and from movement station (MS), transmit data.
Conventionally, battery provides energy for most of mobile devices, so power consumption is that MS design engineer is concerned about.In the MS with WiMAX operation, it is even more important that battery power consumption becomes, and this is because WiMAX likely sends and receive data in the speed range of hundreds of megabits per second (Mbps).Therefore, WiMAX MS may be than traditional 2G and the more power of 3G wireless device consumption.
Summary of the invention
The specific embodiment of the disclosure of invention relates to by dynamically adjust voltage and/or the clock frequency of the processor of equipment according to medium access control (MAC) layer state saves the energy content of battery.
It is a kind of for the method having the mobile device power saving of processor that the specific embodiment of the disclosure of invention provides.The method generally includes: according to a MAC layer state, by voltage and clock frequency, carry out Operation Processor; Be converted to the 2nd MAC layer state; According to the second state, adjust the clock frequency of processor and at least one in voltage.
The specific embodiment of the disclosure of invention provides a kind of computer program economizing on electricity for the mobile device with processor for radio communication.Computer program generally includes the computer-readable medium that stores instruction, and described instruction can be carried out with a plurality of processors by one.Described instruction generally includes: for carrying out the instruction of Operation Processor during in a MAC layer state with clock frequency and voltage when mobile device, for being converted to the instruction of the 2nd MAC layer state, for adjust at least one instruction of the clock frequency of described processor and voltage during in the second state when described mobile device.
The specific embodiment of the disclosure of invention provides a kind of device for radio communication.This device generally includes: processor; For carrying out the module of Operation Processor during in a MAC layer state with clock frequency and voltage when mobile device, for being converted to the module of the 2nd MAC layer state; For adjust at least one module of the clock frequency of described processor and voltage during in the second state when described mobile device.
The specific embodiment of the disclosure of invention provides a kind of mobile device.Described mobile device generally includes: processor; For operating the steering logic of described processor during in a MAC layer state with clock frequency and voltage when mobile device; For being converted to the state logic of the 2nd MAC layer state; Wherein, described steering logic is for adjusting the clock frequency of described processor and at least one of voltage during in the second state when described mobile device.
Accompanying drawing explanation
By with reference to embodiment, can describe more specifically the content of above general introduction, thereby can understand in more detail the above-mentioned feature of the disclosure of invention, some embodiment wherein shown in the drawings.But be noted that accompanying drawing only shows certain typical embodiment of the present invention, therefore should be considered to the restriction to its protection domain, because this description can meet other embodiment of equal value.
Fig. 1, according to the specific embodiment of the disclosure of invention, shows example wireless communications.
Fig. 2, according to the specific embodiment of the disclosure of invention, shows the various assemblies that can utilize in wireless device.
Fig. 3, according to the specific embodiment of the disclosure of invention, shows exemplary transmitters and the exemplary receiver that can in utilizing the wireless communication system of OFDM and OFDM (Orthogonal Frequency Division Multiplexing) (OFDM/OFDMA) technology, use.
Fig. 4, according to the specific embodiment of the disclosure of invention, shows various medium access control (MAC) layer state for the exemplary MAC layer state machine of WiMAX.
Fig. 5, according to the specific embodiment of the disclosure of invention, shows by dynamically adjust voltage and/or the clock frequency of the processor of equipment according to MAC layer state, so that the process flow diagram of the exemplary operation economizing on electricity in mobile device.
Fig. 5 A is the specific embodiment according to the disclosure of invention, with in Fig. 5 for the block scheme of module corresponding to the exemplary operation that economizes on electricity.
Fig. 6 is the specific embodiment according to the disclosure of invention, shows the power consumption of every MIPS for the example chart of the ratio of processor clock frequency.
Embodiment
The specific embodiment of the disclosure of invention provides by dynamically adjust voltage and/or the clock frequency of the processor of equipment according to medium access control (MAC) layer state, to saving technology and the device of the energy content of battery for the mobile device of radio communication.For example, by use higher clock frequency and/or higher voltage and for other MAC layer state (for the normal operating conditions with mass data business, obtain, network enters and dormancy/idle condition) use lower clock frequency and/or lower voltage, can save the energy content of battery, thus the time that extension device can move between battery charge cycle.
example wireless communications
Can in system of broadband wireless communication, utilize the method and apparatus of the disclosure of invention.Term as used herein " broadband wireless " typically refers to the technology that the combination in any with the wireless service such as voice, the Internet and/or data network access can be provided on given area.
WiMAX represents micro-wave access to global intercommunication, and it is the measured broadband wireless technology that provides high-throughput wideband to connect in long distance.Nowadays there is the main application of two kinds of WiMAX: fixedly WiMAX and mobile WiMAX.Fixedly WiMAX application is point-to-multipoint, and it for example allows family and commercial broadband access.Mobile WiMAX provides the complete movability of the cellular network under broadband speeds.
Mobile WiMAX is based on OFDM (OFDM) and OFDMA (OFDM (Orthogonal Frequency Division Multiplexing)) technology.OFDM is the digital multi-carrier modulation technique being widely used at present in various high data rate communication systems.Use OFDM, transmission bit stream is divided into a plurality of low rate subflows.With a subcarrier in a plurality of orthogonal sub-carriers, modulate each subflow, and send each subflow on the sub-channels in a plurality of parallel subchannels.OFDMA will distribute to user's multiple access technology in the subcarrier of different time-gap.OFDMA is the multiple access technology of dirigibility, and it can hold a large number of users with different application, data rate and QoS requirement on a large scale.
Wireless Internet has made the demand of high data rate in radio communication service field day by day increase with the develop rapidly of communicating by letter.Nowadays OFDM/OFDMA system is considered to one of the most promising research field and is the gordian technique of next generation wireless communication.This is because in fact OFDM/OFDMA modulation technique is compared with traditional single-carrier modulation scheme, and multiple advantage can be provided, for example, and modulation efficiency, spectrum efficiency, dirigibility and powerful multipath opposing.
IEEE 802.16x is to be emerging normal structure fixing and mobile broadband wireless access (BWA) system definition air interface.These standard definitions at least 4 different Physical layers (PHY) and a medium access control (MAC) layer.OFDM in these 4 Physical layers and OFDMA Physical layer are respectively fixedly the most general in BWA field and mobile BWA field.
Fig. 1 shows the example of the wireless communication system 100 that can apply embodiments of the invention.Wireless communication system 100 can be system of broadband wireless communication.Wireless communication system 100 can be provided for the communication of a large amount of communities 102, and each Shi You base station, community (BS) 104 is wherein served.Base station 104 can be the fixed station of communicating by letter with user terminal 106.Base station 104 can also be called as access point, Node B or some other terms.
Fig. 1 has described each user terminal 106 scattering in system 100.User terminal 106 can be (that is, static) fixed or move.User terminal 106 can also be called as distant station, accesses terminal, terminal, subscriber unit, movement station, stand, subscriber equipment etc.User terminal 106 can be wireless device, for example cell phone, personal digital assistant (PDA), handheld device, radio modem, kneetop computer, personal computer etc.
Various algorithms and method can be used for the transmission between base station 104 and user terminal 106 in wireless communication system 100.For example, can be according to OFDM/OFDMA technology, sending and receiving signal between base station 104 and user terminal 106.In this case, wireless communication system 100 can be called as OFDM/OFDMA system.
Contribute to 104 communication links that transmit to user terminal 106 from base station can be called downlink 108, and 104 communication links that transmit can be called up-link 110 to base station to contribute to user terminal 106.Or downlink 108 can be called forward link or forward channel, and up-link 110 can be called reverse link or backward channel.
Fig. 2 shows each assembly using in the wireless device 202 that can adopt in wireless communication system 100.Wireless device 202 is the examples that can be used for realizing the equipment of the whole bag of tricks as herein described.Wireless device 202 can be base station 104 or user terminal 106.
Wireless device 202 can comprise processor 204, and it controls the operation of wireless device 202.Processor 204 can also be called CPU (central processing unit) (CPU).This processor can comprise the clock 205 with adjustable frequency, and for specific embodiment, this processor can have adjustable supply voltage and adjustable builtin voltage.
Wireless device 202 can also comprise shell 208, and shell 208 can comprise transmitter 210 and receiver 212, so that carry out the sending and receiving of data between wireless device 202 and long-range place.Transmitter 210 and receiver 212 can be combined into transceiver 214.Antenna 216 can attach on shell 208 and be electrically coupled to transceiver 214.Wireless device 202 can also comprise a plurality of transmitters, a plurality of receiver, a plurality of transceiver and/or a plurality of antenna (not shown).
Wireless device 202 can also comprise signal detector 218, and it can be used for detecting and quantize the level of the signal that transceiver 214 receives.Signal detector 218 can be detected as sort signal pilot energy, power spectrum density and other signal of gross energy, each pseudorandom (PN) chip.Wireless device 202 can also be included in the digital signal processor (DSP) 220 using while carrying out signal processing.
The various assemblies of wireless device 202 can also be coupled by bus system 222, and bus system 222 can comprise power bus, control signal bus and status signal bus in addition and data bus.
Fig. 3 shows the example of operable transmitter 302 in having utilized the wireless communication system 100 of OFDM/OFDMA.Part in transmitter 302 can realize in the transmitter 210 of wireless device 202.Transmitter 302 can be realized in base station 104 so that on downlink 108 to user terminal 106 transmission data 306.Transmitter 302 can also be realized in user terminal 106 so that in up-link 110 the 104 transmission data 306 to base station.
Show the data 306 that will send and offer also (S/P) converter 308 of string as input.S/P converter 308 can be divided into signal transmission N parallel data stream 310.
Then N parallel data stream 310 can be offered to mapper 312 as input.Mapper 312 can be mapped to N parallel data stream 310 in N constellation point.Can carry out described mapping with some modulation constellations, for example, binary phase shift keying (BPSK), orthogonal PSK (QPSK), 8 system phase-shift keyings (8PSK), quadrature amplitude modulation (QAM) etc.Therefore, mapper 312 can be exported N parallel symbol stream 316, and each symbol stream 316 is corresponding to a subcarrier in N orthogonal sub-carriers of inverse fast Fourier transform (IFFT) 320.This N parallel symbol stream 316 is indicated in frequency domain and can converts N parallel time domain sampled flows 318 to by IFFT assembly 320.
Now by the concise and to the point note providing term.N in frequency domain parallel modulation is equivalent to N modulation symbol in frequency domain, and N that is equivalent in frequency domain shines upon and N point IFFT, is equivalent to (useful) OFDM symbol in time domain, is equivalent to N sampling in time domain.An OFDM symbol N in time domain
s, be equivalent to N
cp(quantity of the protection sampling of each OFDM symbol)+N (quantity of the useful sampling of each OFDM symbol).
Can by and string (P/S) converter 324 convert N parallel time domain sampled flows 318 to OFDM/OFDMA symbol and flow 322.Protection plug-in package 326 can insert protection interval between OFDM/OFDMA symbol continuous in OFDM/OFDMA symbol stream 322.Then can pass through radio frequency (RF) front end 328, the output of protection plug-in package 326 be upconverted to the transmit frequency band of expectation.Antenna 330 then can emission results gained signal.
Fig. 3 also shows the example of operable receiver 304 in having utilized the wireless device 202 of OFDM/OFDMA.Part in receiver 304 can realize in the receiver 212 in wireless device 202.Receiver 304 can be realized in user terminal 106, to 104 receive data 306 from base station on downlink 108.Receiver 304 can also be realized in base station 104, to receive data 306 from user terminal 106 in up-link 110.
Show sent data are transmitted on wireless channel 334.When antenna 330 ' receives signal 332 ', can will receive signal 332 ' by RF front end 328 ' and be downconverted into baseband signal.Protection is removed assembly 326 ' and then can be removed by protecting plug-in package 326 to be inserted into the protection interval between OFDM/OFDMA symbol.
The output that protection can be removed to assembly 326 ' offers S/P converter 324 '.S/P converter 324 ' can be divided into OFDM/OFDMA symbol stream 322 ' N parallel time domain symbol stream 318 ', and each symbol stream is wherein corresponding to a subcarrier in N orthogonal sub-carriers.Fast Fourier Transform (FFT) (FFT) assembly 320 ' can be transformed into frequency domain by N parallel time domain symbol stream 318 ', and N Parallel frequency domain symbol stream 316 ' of output.
De-mapping device 312 ' can be carried out the inverse operation by the performed sign map operation of mapper 312, thus N parallel data stream 310 ' of output.P/S converter 308 ' can be combined into individual traffic 306 ' by N parallel data stream 310 '.In the ideal case, this data stream 306 ' is corresponding to offering the data 306 of transmitter 302 as input.
exemplary MAC layer state machine
Fig. 4, according to some embodiment of the disclosure of invention, shows the various MAC layer states for exemplary media access control (MAC) the layer state machine of WiMAX.As shown in Figure 4, MAC layer state can be divided into 4 classifications: obtain 402, networking enters 404, normal running 406 and dormancy/free time 408.
At first, movement station (MS) can enter inactive 410 WiMAX networking.After MS powers up its receiver circuit, MS can enter the state of obtaining 412.Obtaining state 412 times, MS can intercept the broadcast singal from base station 104, and attempts obtaining to have the base station of knowing signal (for example, having minimum channel disturbance noise ratio or the signal of CINR) most.
At MS, obtain behind base station, MS can enter synchronous regime 414, and wherein, synchronous regime 414 is parts that networking enters classification 404.During synchronous regime 414, MS can search for specific downlink parameter, for example DL-MAP MAC administrative messag.It is synchronous that MS just completes MAC after receiving at least one DL-MAP message, and can decode to the DL burst configuration information that wherein comprised.After synchronous, MS can register, and can consult basic function with base station 104.
After MS has met the condition that enters WiMAX networking, MS can start for 416 times at the exchanges data state of normal running 406 to receive data and transmit data to BS from BS.Exchanges data state 416 times, MS can transmit and receive data with hundreds of megabits per second (Mbps).
If there are not the data that can be used for MS in specific time quantum, if or MS is to its serving BS transmission de-registration request (DREG-REQ) message, MS can be converted to electricity-saving state 418 so, and at electricity-saving state, 418 times MS enter park mode or idle pulley.Once enter electricity-saving state 418, MS can Iterim Change to dormancy/idle monitored state 422, to intercept DL signal, downlink channel descriptor (DCD) for example.If MS expectation business indication (TRF-IND)/paging advertisement (PAG-ADV) message, MS can be converted to dormancy/idle access state 424 so, so that from the indication/paging of BS reception business, for example, notice MS wakes up from dormancy/idle pulley, and gets back to the normal running under exchanges data state 416.
If MS does not receive any DL signal during dormancy/idle monitored state 422, MS can get back to electricity-saving state 418 so.Finally, MS can enter and again obtain state 420, to again obtain WiMAX networking from serving BS or from adjacent base station.After again obtaining state 420, MS can enter dormancy/idle monitored state 422, to intercept DL signal from its Current Serving BTS.
the power-saving technique of exemplary state-driven
Because only have the exchanges data state 416 of normal running classification 406 to require to carry out Operation Processor with high clock frequency with relative high voltage, for example, so MS does not need other MAC layer state (, electricity-saving state 418) to carry out Operation Processor with this high clock frequency and high voltage.Therefore,, when moving under other state except exchanges data state 416, processor can adopt lower clock frequency and/or lower voltage.By dynamically and intelligently adjusting clock frequency and/or the operating voltage of processor as MS when a MAC layer state is converted to another MAC layer state, mobile device can be saved the energy content of battery.
Fig. 5 shows by adjust clock frequency and/or the voltage of the processor of mobile device according to MAC layer state, so that the exemplary operation economizing on electricity in mobile device 500.Operation 500 starts at 510 places, operates mobile device processor herein, for example the processor 204 of wireless device 202 according to current MAC layer state with specific clock frequency and specific voltage.
At 520 places, MS can be converted to different MAC layer states.For example, MS can, according to the MAC layer state machine 400 of describing about Fig. 4, be converted to another mac state from a mac state above.In the first example, MAC can be converted to from the exchanges data state 416 of normal running classification 406 electricity-saving state 418 dormancy/idle pulley classification 408.In the second example, the synchronous regime 414 that MS can enter classification 404 from networking is converted to exchanges data state 416.
At 530, MS, can adjust the clock frequency, operating voltage of processor or the two according to new MAC layer state, the maximum data rate corresponding to new state is still provided to save the energy content of battery simultaneously.In the first example of the last period, support the processor of dynamic scaling can or reduce afterwards clock frequency during being converted to electricity-saving state 418 from exchanges data state 416 and/or reduce processor voltage.In the second example, MS can, in response to being converted to exchanges data state 416 from synchronous regime 414, increasing low clock frequency and/or increase processor voltage.As mentioned above, the highest clock frequency of only having exchanges data state 416 need to use processor to support.
For some embodiment, processor can be determined and use which clock frequency and operating voltage according to look-up table, wherein, look-up table is given MAC layer state or clock frequency and/or the operating voltage of classification (for example, classification 402,404,406 and 408) indicative of desired.Look-up table can be stored in processor 204 inside or be stored in the storer 206 of this processor outside.For other embodiment, whether processor can be operated in the MAC layer state in normal running classification 406 according to this MS, determines clock frequency or operating voltage, rather than scaling is for clock frequency and/or the voltage of various MAC layer states and classification.In addition, by using the conversion of MAC manager state to be used as triggering, dynamically to reconfigure the state-transition of modem processor, can increase hardly the expense in software.
Fig. 6 shows every MIPS (million instructions per second) power dissipation rate with respect to the example chart 600 of processor clock frequency.Conventionally, every MIPS power dissipation rate increases along with the increase of clock rate.As mentioned above, the exchanges data state of normal running classification 406 416 times, processor can be only by high-speed transfer with receive operation (this comprises the MIPS of essence) and carry out work.In other MAC layer state or classification, MS processor does not need to carry out work with this large amount of MIPS consumption and high clock speed.As long as processor can provide with other classification (obtain 402, networking enter 404 and dormancy/free time 408) in any one corresponding maximum MIPS, processor just can be in the MAC layer state in these other classifications one time, and the lower clock speed of use is carried out work.
Check the chart 600 in Fig. 6, if clock rate drops to 300MHz from 600HMz, so every MIPS power dissipation rate can reduce at least 36%.Similarly, if clock rate drops to 100MHz from 600MHz, so every MIPS power dissipation rate can decline at least 52%.
Various hardware that can be corresponding by functional module square frame to that indicated in the drawings and/or component software and/or module are carried out the various operations of said method.Conventionally, when the method shown in figure has corresponding functional module diagram, these action block are corresponding to the functional module square frame with similar numbering.For example, the square frame 510-530 shown in Fig. 5 is corresponding with the functional module square frame 510A-530A shown in Fig. 5 A.
As used herein, term " is determined " and is comprised widely action.For example, " determine " and can comprise estimation, calculate, process, derive, investigate, search (for example, in table, database or other data structure, searching), conclude etc." determine " in addition and can comprise reception (for example, reception information), access (for example, the data in incoming memory) etc." determine " and can also comprise parsing, select, select, set up etc.
Can represent information and signal by multiple different technology and any one in skill.For example, the data of mentioning in whole instructions, instruction, order, information, signal, bit, symbol etc. can represent by voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any.
The techniques described herein can be used for various communication systems, comprise the communication system based on orthogonal multiplex scheme.The example of this communication system can comprise OFDM (Orthogonal Frequency Division Multiplexing) (OFDMA) system, single-carrier frequency division multiple access (SC-FDMA) system etc.OFDMA system is utilized OFDM (OFDM), and it is the technology of the subcarrier of a plurality of quadratures that total system bandwidth is divided into.These subcarriers can also be called as tone, frequency range etc.Utilize OFDM, can modulate individually each subcarrier by data.SC-FDMA system can utilize the FDMA (IFDMA) through interweaving to transmit on the subcarrier being distributed in system bandwidth, the FDMA (LFDMA) that utilizes localization transmits having on the piece of adjacent sub-carrier, or utilizes enhancement mode FDMA (EFDMA) to transmit having on a plurality of of adjacent sub-carrier.Conventionally, in frequency domain, with OFDM, send modulation symbol and with SC-FDMA, send modulation symbol in time domain.
In conjunction with various exemplary logical blocks of the present invention, module and circuit, can or realize or carry out for carrying out the combination in any of function as herein described by general processor, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD) (PLD), discrete gate or transistor logic, discrete hardware components.General processor can be microprocessor, or this processor can be any commercial available processor, controller, microcontroller, microprocessor or state machine.Processor is also embodied as the combination of computer equipment, for example, and the combination of the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor and DSP core or any this combination.
The method of describing in conjunction with the disclosure of invention or the step of algorithm can directly be presented as hardware, the software module of being carried out by processor or its combination.Software module can be arranged in the storage medium of arbitrary form known in the art.Some examples of storage medium comprise: random access storage device (RAM), flash memory, ROM (read-only memory) (ROM), eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM etc.Software module can comprise single instruction or a plurality of instruction, and can be distributed on a plurality of different code snippets, between different programs and on a plurality of storage mediums.Storage medium is coupled to processor, thereby makes the processor can be from this read information, and can be to this storage medium writing information.Or storage medium can be inner at processor.
Method as herein described comprises one or more for realizing step or the action of described method.These method steps and/or action can be exchanged each other, and do not depart from the protection domain of claim.In other words, except the particular order of non-designated step and/or action, otherwise can revise order and/or the purposes of particular step and/or action, and not depart from the protection domain of claim.
Can realize described function by hardware, software, firmware or their combination in any.If be embodied as software, described function can be stored as to the one or more instructions on computer-readable medium.Storage medium can be the arbitrary medium of computer-accessible.For example, and unrestricted, this computer-readable medium comprises RAM, ROM, EEPROM, CD-ROM or optical disc memory, magnetic disk memory or can be used for carrying or storing with the instruction of computer-accessible or the form of data structure other medium of expectation program code.The dish using herein and dish comprise compression laser disc (CD), laser laser disc, CD, digital universal dish (DVD), floppy disk,
dish, wherein, coil magnetically playback of data, and dish carrys out playback of data optically with laser.
Can also transmitting software or instruction on transmission medium.For example, if use that coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or the wireless technology such as infrared ray, radio and microwave are come from website, server or other remote source transmitting software, coaxial cable, optical fiber cable, twisted-pair feeder, DSL or the wireless technology such as infrared ray, radio and microwave can be included in the definition of transmission medium so.
In addition, should be appreciated that if available, by user terminal and/or base station, download and/or obtain for carrying out module and/or other suitable module of method as herein described and technology.For example, such equipment can be coupled to server to help transmitting for carrying out the module of method as herein described.Or, available via memory module (for example, RAM, ROM, such as physical storage medium of compression laser disc (CD) or floppy disk etc.) the whole bag of tricks as herein described is provided, make user terminal and/or base station can obtain with to device coupled or provide memory module relevant the whole bag of tricks.In addition can utilize for the technology of other any appropriate of method as herein described and technology is provided.
Should be appreciated that claim is not limited to accurate configuration and the assembly shown in above.Can be to carrying out various modifications, change and distortion in the layout of said method and device, operation and details, and do not depart from the protection domain of claim.
Claims (21)
1. a method of economizing on electricity at the mobile device with processor for radio communication, comprising:
When described mobile device operates described processor in first medium access control MAC layer state lower time with clock frequency and voltage;
Be converted to the 2nd MAC layer state;
When described mobile device is adjusted the clock frequency of described processor and at least one in voltage in described the 2nd MAC layer state lower time;
Be converted to the 3rd MAC layer state;
When described mobile device, in described the 3rd MAC layer state lower time, adjust the clock frequency of described processor and at least one in voltage, make described clock frequency with at least one in described voltage from different with described the 2nd MAC layer state lower time in a described MAC layer state.
2. the method for claim 1, wherein a described MAC layer state comprises exchanges data state, and described the 2nd MAC layer state comprises electricity-saving state.
3. method as claimed in claim 2, wherein, adjusts the clock frequency of described processor and at least one in voltage and comprises: reduce described clock frequency.
4. the method for claim 1, wherein a described MAC layer state comprises electricity-saving state, and described the 2nd MAC layer state comprises exchanges data state.
5. method as claimed in claim 4, wherein, adjusts the clock frequency of described processor and at least one in voltage and comprises: increase described clock frequency.
6. the method for claim 1, wherein adjusting the clock frequency of described processor and at least one in voltage comprises: read look-up table, wherein, described look-up table has for the clock frequency of described the 2nd MAC layer state and at least one of voltage.
7. the method for claim 1, wherein a described MAC layer state comprises synchronous regime, and described the 2nd MAC layer state comprises exchanges data state, and described the 3rd MAC layer state comprises electricity-saving state.
8. for a device for radio communication, comprising:
Processor;
For operating the module of described processor when mobile device with clock frequency and voltage in first medium access control MAC layer state lower time;
For being converted to the module of the 2nd MAC layer state;
For adjust at least one module of the clock frequency of described processor and voltage in the 2nd MAC layer state lower time when described mobile device;
For being converted to the module of the 3rd MAC layer state;
For adjusting the clock frequency of described processor and at least one of voltage when described mobile device in described the 3rd MAC layer state lower time, make described clock frequency with in described voltage at least one from the described MAC layer state module different with described the 2nd MAC layer state lower time.
9. device as claimed in claim 8, wherein, a described MAC layer state comprises exchanges data state, described the 2nd MAC layer state comprises electricity-saving state.
10. device as claimed in claim 9, wherein, at least one the module of adjusting the clock frequency of described processor and voltage for reducing described clock frequency.
11. devices as claimed in claim 8, wherein, a described MAC layer state comprises electricity-saving state, described the 2nd MAC layer state comprises exchanges data state.
12. devices as claimed in claim 11, wherein, at least one the module of adjusting the clock frequency of described processor and voltage for increasing described clock frequency.
13. devices as claimed in claim 8, wherein, for adjusting at least one module of the clock frequency of described processor and voltage, be used for reading look-up table, wherein, described look-up table has for the clock frequency of described the 2nd MAC layer state and at least one of voltage.
14. devices as claimed in claim 8, wherein, a described MAC layer state comprises synchronous regime, and described the 2nd MAC layer state comprises exchanges data state, and described the 3rd MAC layer state comprises electricity-saving state.
15. 1 kinds of mobile devices, comprising:
Processor;
For operating the steering logic of described processor when described mobile device with clock frequency and voltage in first medium access control MAC layer state lower time;
For being converted to the state logic of the 2nd MAC layer state, wherein, described steering logic is for adjust the clock frequency of described processor and at least one in voltage during in described the 2nd MAC layer state at described mobile device,
Wherein, described state logic is used for being converted to the 3rd MAC layer state, and wherein,
Described for the logic adjusted for adjusting the clock frequency of described processor and at least one of voltage when described mobile device during in described the 3rd MAC layer state, make described clock frequency with at least one in described voltage from different with described the 2nd MAC layer state lower time in a described MAC layer state.
16. mobile devices as claimed in claim 15, wherein, a described MAC layer state comprises exchanges data state, described the 2nd MAC layer state comprises electricity-saving state.
17. mobile devices as claimed in claim 16, wherein, described steering logic is for reducing described clock frequency.
18. mobile devices as claimed in claim 15, wherein, a described MAC layer state comprises electricity-saving state, described the 2nd MAC layer state comprises exchanges data state.
19. mobile devices as claimed in claim 18, wherein, described steering logic is for increasing described clock frequency.
20. mobile devices as claimed in claim 15, wherein, described steering logic is used for reading look-up table, and described look-up table has for the clock frequency of described the 2nd MAC layer state and at least one of voltage.
21. mobile devices as claimed in claim 15, wherein, a described MAC layer state comprises synchronous regime, and described the 2nd MAC layer state comprises exchanges data state, and described the 3rd MAC layer state comprises electricity-saving state.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| US12/211,910 US8255010B2 (en) | 2008-09-17 | 2008-09-17 | Methods and systems for state-driven power savings for WiMAX |
| US12/211,910 | 2008-09-17 | ||
| PCT/US2009/057000 WO2010033510A1 (en) | 2008-09-17 | 2009-09-15 | Methods and systems for state-driven power savings for wimax |
Publications (2)
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| CN102160015A CN102160015A (en) | 2011-08-17 |
| CN102160015B true CN102160015B (en) | 2014-03-19 |
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| CN200980136462.3A Expired - Fee Related CN102160015B (en) | 2008-09-17 | 2009-09-15 | Methods and systems for state-driven power savings for wimax |
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| US (1) | US8255010B2 (en) |
| EP (1) | EP2347319B1 (en) |
| JP (1) | JP5575773B2 (en) |
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| CN (1) | CN102160015B (en) |
| TW (1) | TW201016055A (en) |
| WO (1) | WO2010033510A1 (en) |
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| KR101545876B1 (en) * | 2009-01-22 | 2015-08-27 | 삼성전자주식회사 | Method for power saving based on motion sensor and mobile terminal using the same |
| FR2944930B1 (en) * | 2009-04-22 | 2011-06-24 | Sagem Comm | METHOD AND DEVICE FOR REDUCING THE ELECTRICAL CONSUMPTION OF AN ETHERNET INTERFACE |
| US20110273213A1 (en) * | 2010-05-06 | 2011-11-10 | Qualcomm Incorporated | Method and apparatus to dynamically adjust a clock rate in a mobile device |
| US8917733B2 (en) * | 2011-12-06 | 2014-12-23 | Qualcomm Incorporated | Using wireless wide area network protocol information for managing a performance level of a processor |
| US8861416B2 (en) * | 2012-06-14 | 2014-10-14 | Qualcomm Incorporated | Power savings for inter-radio access technology measurement |
| US9668277B2 (en) * | 2013-03-13 | 2017-05-30 | Qualcomm Incorporated | Adaptive clock rate for high speed data communications |
| KR102059409B1 (en) | 2013-10-10 | 2019-12-26 | 한국전자통신연구원 | Sleep mode control method based on IP |
| KR102059410B1 (en) | 2013-10-10 | 2019-12-26 | 한국전자통신연구원 | IP based sleep mode control method using synchonization information |
| US10007317B2 (en) * | 2014-04-10 | 2018-06-26 | Qualcomm Incorporated | Techniques for controlling power usage based on network parameters |
| US10001830B2 (en) * | 2014-06-16 | 2018-06-19 | Marvell World Trade Ltd. | Input-output device management using dynamic clock frequency |
| EP3264832B1 (en) * | 2016-06-30 | 2020-02-12 | Intel IP Corporation | Baseband processor and method for power saving by adjustment of clock rate and supply voltage |
| JP7140184B2 (en) * | 2018-03-15 | 2022-09-21 | 富士通株式会社 | Wireless communication system, base station, mobile station and wireless communication method |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20110081982A (en) | 2011-07-15 |
| CN102160015A (en) | 2011-08-17 |
| EP2347319A1 (en) | 2011-07-27 |
| EP2347319B1 (en) | 2016-10-19 |
| US20100069128A1 (en) | 2010-03-18 |
| US8255010B2 (en) | 2012-08-28 |
| TW201016055A (en) | 2010-04-16 |
| JP5575773B2 (en) | 2014-08-20 |
| JP2012503434A (en) | 2012-02-02 |
| WO2010033510A1 (en) | 2010-03-25 |
| KR101221525B1 (en) | 2013-01-11 |
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